<template>
	<view class="search-box">
		<uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
    <!-- 搜索建议 -->
    <view class="sugg-list" v-if="searchResults.length">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDeatil(item)">
        <view class="goods-name">
          {{item.goods_name}}
        </view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
	<!-- 搜索历史 -->
  <view class="history-box" v-else>
    <!-- 标题区域 -->
    <view class="history-title">
      <text>搜索历史</text>
      <uni-icons type="trash" size="17" @click="clean"></uni-icons>
    </view>
    <!-- 列表区域 -->
    <view class="history-list">
      <uni-tag @click="gotoGoodsList(item)" :text="item" v-for="(item,i) in histories" :key="i"></uni-tag>
    </view>
  </view>
  </view>
  
</template>

<script>
	export default {
    
		data() {
			return {
				timer:null,
        kw:'',
        searchResults:[],
        historyList:[]
			};
		},
    onLoad(){
     this.historyList = JSON.parse(uni.getStorageSync('kw') || '[]')
    },
    computed:{
      histories(){
        return [...this.historyList].reverse()
      }
    },
    methods:{
      input(e){
        clearTimeout(this.timer)
        this.timer = setTimeout(()=>{
          this.kw = e.value
          this.getSearchList()
        },500)
      },
      async getSearchList(){
        if(this.kw === ''){
          this.searchResults = []
          return 
        }else{
          const {data:res} = await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
          // console.log(res)
          if(res.meta.status !== 200){
            return uni.$showMag()
          }else{
            this.searchResults = res.message
          }
          this.saveSearchHistory()
        }
      },
      gotoDeatil(item){
        uni.navigateTo({
          url:'/subpkg/goods_detail/goods_detail?goods_id='+item.goods_id
        })
      },
      // 保存搜索历史记录
      saveSearchHistory(){
         // 1. 将 Array 数组转化为 Set 对象
         const set = new Set(this.historyList)
         // 2. 调用 Set 对象的 delete 方法，移除对应的元素
         set.delete(this.kw)
         // 3. 调用 Set 对象的 add 方法，向 Set 中添加元素
         set.add(this.kw)
          // 4. 将 Set 对象转化为 Array 数组
          this.historyList = Array.from(set)
        // this.historyList.push(this.kw)
        uni.setStorageSync('kw' , JSON.stringify(this.historyList))
      },
      clean(){
        this.historyList = []
        uni.setStorageSync('kw',JSON.stringify([]))
      },
      gotoGoodsList(item){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query='+item
        })
      }
    }
	}
</script>

<style lang="scss">
.search-box {
  position: sticky;
  top:0;
  z-index: 999;
  .sugg-list {
    padding: 0 10rpx;
    
    .sugg-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 24rpx;
      padding: 26rpx 0;
      border-bottom: 2rpx solid #efefef;
      .goods-name {
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }
    }
  }
  .history-box {
    padding: 0 10rpx;
    .history-title {
      display: flex;
      justify-content: space-between;
      height: 80rpx;
      align-items: center;
      font-size: 26rpx;
      border-bottom: 2rpx solid #efefef;
    }
    .history-list {
      display: flex;
      flex-wrap: wrap;
      .uni-tag {
        margin-top: 10rpx;
        margin-right: 10rpx;
      }
    }
  }
}
</style>
